Electric-light socket and bulb base



Nov. 20, 1928.

v P. S. HALL ELECTRIC LIGHT SOCKET AND BULB BASE Filed Sept- 1926 PazJJZ Hqf VEN I DR ATTORNEY Patented Nov. 20, 1928.

UNITED STATES PATENT OFFICE.

PAUL S. HALL, OF AUSTIN, MINNESOTA, ASSIGNOR F ONE-HALF TO GUSTAV J. VOSS,

OF AUSTIN, MINNESOTA.

ELECTRIC-LIGHT SOCKET AND BULB BASE.

Application filed September 22, 1926. Serial No 137,095.

This invention relates to electric light sockets for lamp bulbs, and contemplates the provision of means for locking the bulb in the socket, and thereby prevent theft of the bulbs, or loosening of the latter when subject to vibration under any circumstances.

In carrying out the invention I conteirplate the use of a resilient locking finger arranged within the socket, and adapted to cooperate with a shoulder formed on the base of the lamp bulb, so that when the latter is screwed into the socket, it can not be removed therefrom without destroying the bulb.

The nature and advantages of the invention will be better understood when the :tollowing detail description is read in connection with the accompanying drawing, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawing forming part of this application like numerals of reference indicate similar parts in the several views and wherein:

Figure 1 is a sectional view showing how the bulb is locked within the socket.

Figure 2 is a sectional view showing the arrangement of the locking finger within the socket.

Figure 3 is an end view of the bulbshowing the shoulder formed in the base thereott.

Referring to the drawing in detail represents an electric light socket of ordinary well known construction in which is arranged a curved resilient locking finger 11. The 35 finger is secured to the base of the socket at one end thereof as at 12, while the other end of the ringer is curved outwardly and down wardly to lie in a path of the base 13 of an electric light bulb 14, when the latter is being screwed into the socket. The base of this bulb is formed with a beveled or inclined surface 15 at one end of which is arranged a shoulder 16, and when the bulb is screwed home within the socket, the free end of the locking finger rests upon the inclined surface 15, and bears against the shoulder '16 in a manner to prevent the bulb from being removed or loosened within the socket when subjected to vibration. which the bulb can be removed is by breakthe latter and subsequently making use of suitable instruments to force the finger 11 away from the shoulder.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent, I desire to have it understood, that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What is claimed is:

The combination with an electric light socket, a lamp bulb base received by said socket and having a peripheral inclined surface and a vertical shoulder "formed thereon, and a horizontally disposed flat resilient finger ter- The only way in minally secured to the base of said socket and spaced therefrom, saidfinger being twisted at a point in its length to position its free end tangentially to the bulb base and contact said shoulder for locking the bulb against movement within the socket. I

In testimony whereof I aifix my signature.

PAUL s. HALL. 

